Message
Excuse my extreme rotary newness, but what are "parallel cores"?
Thanks,
MikeJ
Consider yourself excused :-)
Lots of folks use AC evaporator cores for radiators,
and it typically requires two of them to cool a 13B engine. The
plumbing options are "series", where you flow from the engine into one
of the cores, then out of that one, into the 2nd one, then out and back
to the engine. "Parallel"
would be where you come out of the engine, then use a Y or a T to flow
to both cores at the same time. On the outlet of the cores, you Y or T
them again, and go back to the engine.
The Parallel method offers less resistance, thus
a theoretically higher flow rate. It also puts the hottest coolant in
contact with more cool air than you would in series. This should
clearly be the preferred method. The downside is the extra connections
that are required, and the fact that sometimes it's hard to make the
water flow evenly between the cores. For example, if you need a few
more turns, length of hose to get to one of the cores, the other one
will probably flow more coolant. In and extreme case, hardly any
coolant will pass through the more restrictive core. Series makes sure
that both get even flow, and simplifies the plumbing.
Cheers,
Rusty